Liu Yuanyuan, a master's degree, intermediate engineer.2009 years，Graduated from Hebei University of Technology for mechanical design and theoretical majors;2009-2016 years，m88 online bettingEntering the R & D of the Railway Passenger Cars; 2017-2023，engaged in the fuse manufacturing process and research and development work。20231In February, I joined the Xi'an Mingde Institute of Technology，Presatonous teachers who are mechanical design and manufacturing and their automation professional，Lecture Course: "MechanicalDrawing "," AutoCAD "and so on.